dmd 2.029 release

[Steven Schveighoffer]

On Wed, 22 Apr 2009 13:49:18 -0400, Andrei Alexandrescu  
<SeeWebsiteForEmail at erdani.org> wrote:

> tama wrote:
>> On Mon, 20 Apr 2009 16:09:09 +0900, Walter Bright
>> <newshound1 at digitalmars.com> wrote:
>>
>>>
>>> This is a major revision to Phobos, including Andrei's revolutionary
>>> new range support.
>>>
>>> http://www.digitalmars.com/d/2.0/changelog.html
>>> http://ftp.digitalmars.com/dmd.2.029.zip
>>
>> Range is so cool!
>>
>> Though...
>> I tried following code:
>>
>> void main()
>> {
>>     writeln("Case1");
>>     {
>>         Mt19937 gen = Mt19937(0);
>>         writeln(gen.front);
>>         gen.popFront;
>>         writeln(gen.front);
>>     }
>>     writeln("---");
>>     {
>>         Mt19937 gen = Mt19937(0);
>>         advance(gen, 1);  // skip 1 element
>>         writeln(gen.front);
>>         gen.popFront;
>>         writeln(gen.front);
>>     }
>>     writeln("\nCase2");
>>     {
>>         Mt19937 gen;
>>         writeln(gen.front);
>>         gen.popFront;
>>         writeln(gen.front);
>>     }
>>     writeln("---");
>>     {
>>         Mt19937 gen;
>>         advance(gen, 1);  // skip 1 element
>>         writeln(gen.front);
>>         gen.popFront;
>>         writeln(gen.front);
>>     }
>> }
>>
>> Result:
>>
>> Case1
>> 2357136044 (1)
>> 2546248239 (2)
>> ---
>> 2546248239 (2)
>> 3071714933 (3)
>>
>> Case2
>> 581869302  (1)
>> 3890346734 (2)
>> ---
>> 581869302  (1)?
>> 3890346734 (2)?
>>
>> I think 'Case1' is correct, but 'Case2' is wrong.
>> Mt19937's bug?
>>
>
> If you initialize the Mersenne twister with no seed it will start with
> seed 5489u.

I think his point is in the second part of Case2, he skipped one element,  
but it appears that it didn't skip anything.

-Steve